An issue was discovered in Navigate CMS through 2.8.7. It allows Directory Traversal because lib/packages/templates/template.class.php mishandles ../ and ..\ substrings.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.